Four New Flavones and a New Isoflavone from Iris bungei

Abstract

Four new irisflavones A-D (1-4) and irilin D (5) have been isolated from the underground parts of Iris bungei along with known isoflavones, irilins A-B (6-7) and tlatancuayin (8). The structures of the new compounds were determined using NMR and mass spectroscopic methods and were found to be 2',5,7-trihydroxy-3,6-dimethoxyflavone (1), 2',5-dihydroxy-3,6,7-trimethoxyflavone (2), 2',5,6'-trihydroxy-3,6,7-trimethoxyflavone (3), 3,3',5-trihydroxy-2',7-dimethoxyflavone (4), and 3',4',5,7-tetrahydroxy-6-methoxyisoflavone (5). The structures of irisflavones 1, 3, and 4 were confirmed by single-crystal X-ray diffraction studies.

A benzil and isoflavone from Iris tenuifolia

“…The known compounds 3-14 were characterized by comparison of physical and spectral data with the literature values (Jaipetch et al, 1983;Shawl and Kumar, 1992;Inoshiri et al, 1988;Hanawa et al, 1991;Elliger and Halloin, 1994;Jong and Hwang, 1995;Sadikum et al, 1996;Shawl et al, 1984;Kojima et al, 1997;Choudhary et al, 2001b;Prawat et al, 1995). Known compounds were first time isolated from this plant species.…”

Preparative isolation and purification of antioxidative diarylheptanoid derivatives from Alnus japonica by high‐speed counter‐current chromatography

“…Checking the sequence of the methylene and oxymethine carbon by twodimensional shift correlation spectroscopy, the structure of compound 2 was determined to be a 3-deoxo-derivative of compound 1. On the basis of 1 H and 13 C-NMR data and direct comparison of spectral data from the literature [27][28][29][30][31], structures of isolated compounds were determined (Fig. 5).…”

Quantitative Analysis of Irigenin in the Different Species of Iris Plant by RP- HPLC and its Efficacy Against Different Plant Pathogens

“…Among the new isoflavone glycosides isolated from the genus Iris during the reporting period, there are five containing monosaccharides, nine containing disaccharides and one containing trisaccharides. 9,10,11,12,13 Generally, the control of plant diseases is well established with synthetic fungicides.…”